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#1 2021-01-17 03:19:44

avlec
Member
Registered: 2021-01-17
Posts: 2

Flickering Video Output Issues

I am trying to setup a multi-monitor display on my new install. The HDMI monitor seems to render without any flickering before I execute the first startx of the systems uptime. There is no flickering on the displayport monitor. These monitors are sharing the same graphics card. It is also worth noting that the screen seems to persist images after the Xorg session has been killed and even leaves them embedded in the monitor after the HDMI is unplugged. It is also worth noting that the monitor works fine when running Windows 10.

Kernel:
Linux 5.10.7-zen1-1-zen

Relevant Packages:
xf86-video-nouveau 1.0.16-2
mesa 20.3.3-1
xorg-server 1.20.10-3
xorg-xinit 1.4.1-3
xmonad 0.15-92

Troubleshooting Performed:

Single monitor displayport, no problems
Single monitor HDMI, flickering (baseline bad)
Setting refresh rate to 60.00 with xrandr, flickering (baseline bad)
Setting refresh rate to 75.00 with xrandr, flickering (slightly better)
Changing resolution from 2560x1080 to 1920x1080 with xrandr, (flickering just noticeable)
Disabled picom, no change

Output of xrandr

Screen 0: minimum 320 x 200, current 4480 x 1080, maximum 16384 x 16384
DVI-I-1 disconnected primary (normal left inverted right x axis y axis)
DVI-D-1 disconnected (normal left inverted right x axis y axis)
HDMI-1 connected 2560x1080+0+0 (normal left inverted right x axis y axis) 798mm x 334mm
   2560x1080     59.98*+  74.99  
   1920x1080     60.00    50.00    59.94  
   1680x1050     59.88  
   1600x900      60.00  
   1280x1024     75.02    60.02  
   1280x800      59.91  
   1152x864      75.00  
   1280x720      60.00    50.00    59.94  
   1024x768      75.03    60.00  
   832x624       74.55  
   800x600       75.00    60.32  
   720x576       50.00  
   720x480       60.00    59.94  
   640x480       75.00    60.00    59.94  
DP-1 connected 1920x1080+2560+0 (normal left inverted right x axis y axis) 531mm x 299mm
   1920x1080     60.00*+ 144.00   119.98    99.93    84.90    50.00    59.94  
   1680x1050     59.95  
   1280x1024     75.02    60.02  
   1440x900      59.89  
   1280x960      60.00  
   1280x800      59.81  
   1152x864      75.00  
   1280x720      60.00    50.00    59.94  
   1024x768      75.03    70.07    60.00  
   832x624       74.55  
   800x600       72.19    75.00    60.32    56.25  
   720x576       50.00  
   720x480       60.00    59.94  
   640x480       75.00    66.67    60.00    59.94  
   720x400       70.08

If any other information would be helpful I can provide. And thanks in advance for your time.

Last edited by avlec (2021-01-18 19:25:15)

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#2 2021-01-17 08:39:26

seth
Member
Registered: 2012-09-03
Posts: 18,972

Re: Flickering Video Output Issues

Please use code tags, not quote tags, for shell output.

Did you try
a) the modesetting driver (drop xf86-video-nouveau)
b) the nvidia blob

Also please elaborate on the nature of the "flickering" - is it tearing or do you get intermittent black frames,  do you see the last image in a forth and back, what frequency does it flicker at, …

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#3 2021-01-18 19:27:53

avlec
Member
Registered: 2021-01-17
Posts: 2

Re: Flickering Video Output Issues

The flickering contains intermittent black frames, and the frequency seems to vary with the monitor's resolution. 1920x1080 seems to be a lot "clearer" than 2560x1080. I have tried the NVIDIA drivers and they seem to lock up my system and prevent booting into Arch. I will try the modesetting later, after I figure out how to do that.

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#4 2021-01-18 22:36:51

seth
Member
Registered: 2012-09-03
Posts: 18,972

Re: Flickering Video Output Issues

tried the NVIDIA drivers and they seem to lock up my system and prevent booting

Unlikely, please post your xorg log and the output of lspci.

after I figure out how to do that

seth wrote:

drop xf86-video-nouveau

That means to remove the package.

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